Skiving machine



May 26, 1936. M H ROSKE 2,041,701 SKIVING MAdHINE I Original Filed Jan.9, 1954 2 Sheets-Sheet 1 Figl m N. Rush May26,1936. M. H. ROSKE I2,041,701

SKIVING MACHINE Original Filed Jan. 9, 1954 2 Sheets-Sheet 2 Fig". 2.

Fig.6.

Patented May 26, 1936 UNITED STATES PATENT OFFICE SKIVING MACHINEApplication January 9, 1934, Serial No. 705,931 Renewed May 3, 1935 13Claims.

This invention relates to skiving machines and is herein illustrated asembodied in a machine of the well-known Amazeen type for skiving theedges of pieces of upper leather.

In the manufacture of certain kinds of shoes, it is desirable to produceon a single part of an upper two or more scarfs which differ in width orin character or in both. For example, it may be necessary to providealong the top and front of a quarter a shoulder or fold scarf, toproduce along the bottom a feather edge or underlap scarf and to producealong the back a seam scarf. In such and similar cases, it is desirablethat the operator be able instantly to change the operative positions ofthe work-engaging parts of the machine so as to avoid delay in producingfirst one kind of scarf and then another. A machine in general usecomprises a knife, a roll for feeding the Work to the knife, said rollbeing angularly adjustable to vary the inclination of the scarfproduced, a presser for holding the work on the roll and a guide forengaging the edge of the work.

According to one feature of the present invention, a singleoperator-controlled member may be manipulated to change the angularposition of the roll so as to change the inclination of the scarfproduced and at the same time to adjust the edge guide so as to changethe width of the scarf. In the illustrated construction, the work is fedto a rotary disk knife by a feed roll mounted on an angularly adjustablesupport on which the presser and edge guide are slidable, a treadlebeing provided manipulation of which adjusts the feed roll supportangularly and simultaneously adjusts the presser and edge guide alongthe support. The limits of angular movement of the feed roll support aredetermined by adjustable stops so that, with the treadle raised, a scarfof certain predetermined inclination is produced and with the treadledepressed a scarf of diiferent predetermined inclination is produced.The machine is constructed and arranged to produce a narrow fold orshoulder scarf of a predetermined width when the treadle is raised and aT wider feather edge scarf when the treadle is eluding certain detailsof construction and combinations of parts, will be described as embodiedin an illustrated machine and pointed out in the appended claims.

Referring now to the accompanying drawings,

Fig. 1 is a front elevation of a machine in which thepresent inventionis embodied,

Fig. 2 is a section on the line IIII of Fig. 1 showing the presser andguide and the manner in which they are mounted,

Fig. 3 is a more or less diagrammatic elevation showing the position ofthe work-engaging parts when the treadle is in raised position, theplane of the cut of the knife being indicated by a line,

Fig. 4 is a section of a piece of work showing the kind of scarf whichis produced when the parts of the machine are in the positions shown inFig. 3,

Fig. 5 is an elevation after the manner of Fig. 3 showing thework-engaging parts in the position occupied by them after the treadlehas been depressed to adjust the feed roll angularly and to adjust theedge guide to the right, and

Fig. 6 is a section of a piece of work showing the kind of scarf whichis produced when the work-engaging parts of the machine are in thepositions shown in Fig. 5.

The illustrated machine is similar in many respects to the machinedisclosed in United States Letters Patent No. 1,866,918, granted June12, 1932, upon an application filed in the name of Milton H. Ballard.The present machine, like that of the patent, comprises a rotary diskknife 9, a rotary feed roll I I and a rotary feed disk 13. The knife ismanually adjustable substantially vertically toward and from the feedroll. The feed disk presses a portion of the work against a reduced endof the feed roll and aids in feeding the work. The feed roll shaft isrotatable in a block l5 which is adjustable horizontally on a supportll, said support being angularly adjustable in a curved guideway l8 thecenter of curvature of Which lies in a horizontal axis which passesthrough an element on the upper surface" of the feed roll. It will benoted, however, that by adjusting the block #5 to the right or left, theposition of this point with respect to the feed roll may be changed. Theblock l5 carries a superstructure by which the feed disk is carried sothat angular adjustment of the feed roll support I? adjusts the feeddisk. The feed disk and feed roll thus preserve at all times theirrelative positions. The curved guideway in which the feed roll supportis adjusted is located at the outer end of a large arm l9, said armbeing adjustable in a horizontal path about the axis of a vertical stud2! to adjust the feed roll toward and from the knife; and the feed rollshaft is connected by a telescoping shaft 23 and a universal joint witha driving pulley 25. The feed roll support If is connected by a link 21with a treadle-controlled arm 29 pivoted at 3% to the base of themachine and carrying a small block 33. Two small adjusting nuts 35threaded on a small rod 3? limit the rocking movement of the arm 29 andhence the extent of angular adjustment of the feed roll support ii. Thearm 29 is connected by a link 30 and a pivot 32 with the upper end of atreadle rod 39 in such manner that vertical movement of the rod swingsthe arm to the right or left. The lower end of the rod is connected to atreadle -H normally held in raised position by a spring 49 to hold thefeed roll H in its up position in which the uppermost element of itsperiphery is parallel to the plane of the knife or substantially so. Anedge guide 43 which is carried indirectly by the block l5 has a stem 53which carries a yieldingly mounted adjustable presser 46. The machine asthus far described may be substantially the same as the patented machineand will not be described further in detail. It will be noted, however,that the work to be skived is fed away from the observer, as viewed inFig. 1, With its edge against the guide 43 and its margin beneath thepresser, the skived work passing beneath the rotary knife 9. With theparts in their normal positions, as shown in Fig. l, a shoulder or foldscarf will be produced; and when the treadle is depressed to swing theroll in a counterclockwise direction until the small block 33 encountersthe right-end stop 35, a feather edge scarf will be produced, thepositions in which the two limiting stops 35 are held thus determiningthe characteristics of the two scarfs.

The presser and edge guide, except for their mounting for quickadjustment in a path transverse to the line of feed of the work, are ormay be substantially like the presser and guide disclosed in UnitedStates Letters Patent No. 1,180,222, granted April 18, 1916, on anapplication filed in the name of Alexander M. Alexander. It will beunderstood that the presser is so mounted by means of pivots and springsthat it holds the margin of the work firmly against the periphery of thefeed roll irrespective of its position longitudinally of said roll.

In the present construction the presser and edge guide, instead of beinghorizontally adjustable by hand longitudinally of the feed roll as theyare in the patented machine, are automatically adjusted when the feedroll is adjusted angularly by manipulation of the treadle 4| or, as willpresently appear, may be so adjusted at any time by manipulating asecond treadle 5!. The stem 53 of the guide is slidably mounted in asubstantially horizontal guideway formed in the rear side of a bracket55 which is rigid with the block l5 and is adjusted angularly when thefeed roll support is 50 adjusted, said stem being held in this guidewayby a thin plate 5? (Fig. 2) and screws 59. In the normal position ofparts, with the treadle QI raised, the stem 53 is held to the right by atension spring 8! as far as is permitted by a stop pin 63 on the stemwhich is held against an inclined face on an adjustable stationary cam65, this spring being fastened at one end to the stem 53 and at theother to a pin 61 driven into the heavy arm 19. The stationary cam 65 ispivoted at 59 to a narrow plate the plate '55.

H and may be adjusted into and held in various angular positions aboutits pivot 69 by a thumbscrew 13 threaded through an ear on the cam 65and bearing against an ear on the narrow plate 1!. The narrow plate H isadjustably mounted on a larger plate 15 by means of two screws I! whichpass through substantially vertical slots in the plate ll and arethreaded into The large plate is adjustably mounted on the heavy arm l9by two screws 19 which pass through a substantially horizontal slot inthe plate 15 and are threaded in the arm [9. With this construction, thestationary cam 65 may be adjusted vertically after the screws T! havebeen loosened, horizontally after the screws 19 have been loosened andangularly about its pivot 69.

In Fig. 3, the presser es, the edge guide 43 and the feed roll I! areshown in the positions occupied by them in Fig. l; and with these partsin these positions, a comparatively narrow fold scarf will be formed inthe work, as shown in Fig. 4. If now the treadle BI is depressed to tiltthe feed roll counterclockwise, the tension spring 6! will pull thepresser and guide to the right, the stop pin 53 (Fig. l) riding up theinclined face of the cam 65 so that the parts will occupy the positionsshown in Fig. 5 and a comparatively wide feather edge scarf will beproduced on the work Hill, as shown in Fig. 6. The

angular ,movement of the roll takes place about a point such as the oneindicated at a: in the upper surface of the feed roll as it does in themachine of the Ballard patent. Thus the operator, by manipulating asingle treadle, may instantly change from a narrow fold scarf to a widerfeather edge scarf, and vice versa.

It is desirable at times to produce a seam scarf, that is a scarf likethe feather edge scarf but of somewhat less width and with an edge whichis of appreciable thickness. To form such a scarf, the parts of themachine should be in the positions shown in Fig. 5 but with the presserand guide moved to the left, for example into a position in which thework-engaging face of the guide 43 is in register with the point x. Tothis end (Figs. 1, 2), the second treadle 5| has a treadle rod 8!normally held up by a spring 83, the upper end of said rod being pivotedat to the horizontal arm of a bell-crank lever 81, said lever beingpivoted at 89 to the heavy arm l9 and having an upwardly extending armwhich will engage the stop pin 63 and push the stem 53 to the left whensaid bell-crank lever is rocked counterclockwise by depressing thetreadle 5 I. In order to limit the extent of movement of the presser andguide to the left, a slotted stop plate 9! is adjustably fastened to thebracket 55 by a screw 93. When, therefore, it is desired to produce aseam scarf, both treadles are depressed. It should be noted, however,that the presser and guide may be adjusted along the periphery of thefeed roll in any angular position of the feed roll whenever suchadjustment may be desired.

Although the invention has been set forth as embodied in a. particularmachine having a rotary disk knife and an angularly adjustable feedroll, it should be understood that the invention is not limited in thescope of its application to the particular machine which has been shownand described.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. A skiving machine having, in combination,

work-engaging parts including a knife, a feed roll and a presser soconstructed and arranged that changing their angular relation changesthe angle of the scarf produced, an edge guide adjustable transverse tothe direction of feed movement of the work to change the width of thescarf, a single operator-controlled member manipulation of which changesthe angular relation of the first-named parts and adjusts the edgeguide, and a second operator-controlled member which may be manipulatedto adjust the edge guide without changing the angular relation of theother parts.

2. A skiving machine having, in combination, work-engaging partsincluding a knife, a feed roll and a presser so constructed and arrangedthat changing the relative angular positions occupied by the knife onthe one hand and the feed roll and presser on the other hand changes theangular inclination of the scarf produced, an edge guide adjustabletransverse to the direction of feed movement of the work to change thewidth of the scarf, a single operator-controlled member manipulation ofwhich changes the angular relation between the knife and the presser androll and adjusts the edge guide, and a second operator-controlled memberwhich may be manipulated to adjust the edge guide irrespective of therelative angular positions of the other parts.

3. A skiving machine having, in combination, a knife, a feed roll, asupport for the feed roll, a presser and edge guide, a carrier for thepresser and guide mounted for adjustment longitudinally of the feedroll, a single operator-controlled member manipulation of which changesthe angular relation between the knife and the feed roll and adjusts thecarrier for the presser and edge guide, and a second operator-controlledmember manipulation of which adjusts the carrier for the presser andedge guide irrespective of the angular relation between the knife andthe feed roll.

4. A skiving machine having, in combination, a knife, a feed roll, asupport for the roll angularly adjustable to vary the inclination of thescarf produced, a presser for holding the work against the roll, a guidefor engaging the edge of the work, a carrier for said presser and guideslidably mounted upon said feed roll support, and means operated byadjustment of the roll support angularly for sliding the carrier for thepresser and edge guide along the feed roll suport.

p 5. A skiving machine having, in combination, a knife, a feed roll, asupport for the roll angularly adjustable to vary the inclination of thescarf produced, a presser for holding the work against the roll, a guidefor engaging the edge of the work, a carrier for said presser and guideslidably mounted upon said feed roll support, and a singleoperator-controlled member manipulation of which adjusts the feed rollsupport angularly and simultaneously adjusts the carrier for the presserand edge guide along the feed roll support.

6. A skiving machine having, in combination, a knife, a feed roll, asupport for the roll angularly adjustable to vary the inclination of thescarf produced, a presser for holding the work against the roll, a guidefor engaging the edge of the work, a carrier for said presser and guideslidably mounted upon said feed roll support, a singleoperator-controlled member manipulation of which adjusts the feed rollsupport angularly and simultaneously adjusts the carrier for the presserand edge guide along the feed roll support, and a secondoperator-controlled member which may be manipulated to adjust the 5carrier only.

'7. A skiving machine having, in combination, a knife, a feed roll, asupport for the roll angularly adjustable to vary the inclination of thescarf produced, a presser for holding the work against the roll, a guidefor engaging the edge of the work, a carrier for said presser and guideslidably mounted on the roll support, and a cam adapted to slide thecarrier along the roll support when said roll support is adjustedangularly.

8. A skiving machine having, in combination, a knife, a feed roll, asupport for the roll angularly adjustable to vary the inclination of thescarf produced, a presser for holding the work against the roll, a guidefor engaging the edge of the work, a carrier for said presser and guideslidably mounted on the roll support, and a cam adapted to slide thecarrier along the roll support when said roll support is adjustedangularly, said cam being adjustable to vary the extent to which thecarrier is moved.

9. A skiving machine having, in combination, a knife, a feed roll foradvancing the work to the knife, a presser for holding the work on thefeed roll, an edge guide for engaging the edge of the work, yieldingmeans for normally holding the roll, the presser and the edge guide inpositions to cause the knife to produce on the work a narrow fold scarf,and a single member manipulation of which adjusts the roll, presser andguide into positions to cause the knife to produce a wider feather edgescarf.

10. A skiving machine having, in combination, a knife, a feed rollangularly adjustable to vary the inclination of the scarf produced, aguide for engaging the edge of the work, and a cam adapted to adjust theguide longitudinally of the 1feelol roll when said feed roll is adjustedanguar y.

11. A skiving machine having, in combination, a knife, a feed rollangularly adjustable to vary the inclination of the scarf produced, aguide for engaging the edge of the work, and a cam adapted to adjust theguide longitudinally of the feed roll when said feed roll is adjustedangularly, said cam being adjustable to vary the extent of theadjustment imparted to the guide.

12. A skiving machine having, in combination, a knife, a feed rollangularly adjustable to vary the inclination of the scarf produced, aguide for engaging the edge of the work, a stem by which the guide iscarried, a treadle manipulationof which adjusts the roll angularly, anda stationary cam adapted to engage and move the stem of the guide whenthe treadle is manipulated.

13. A skiving machine having, in combination, a knife, a feed roll, asupport for the feed roll, an arm upon which the support is mounted forangular adjustment, a presser for holding the work against the roll, aguide for engaging the edge of the work, a carrier for said presser andguide slidable on the roll support, and a cam mounted on the arm andadapted to slide the presser and guide on the roll support when saidsupport is adjusted angularly.

MILTON ROSKE.

